Cylinder-forming machine



Feb. 7, 1928.

G. S. WOODFORD CYLINDER FORMING MACHINE Filed June e. 1927 Il I l' INVENTOR L. S W00 ofor ATTORNEY iii onneonr insana ANGELES, CALEORN 1A.

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CYLIN MACHEN application filed June G, 192?. Serial No. 1961933.

My invention relates to machines used in the n .tutacture ot cylindrical paper cups or cc ners for frozen contections. Such that a portion thereof Will lap over an end ot the mandrel; this tapped portion is turned over the end and tiert tute the bottom ot the container.

tened down to consti- -n order to compress the dedover end ot the `paper oind paclr it` aha nst leakage considerable jressnrc is required. i t :tore it has been the practice to empioy a presser member on a sivi ging carrier that can be brought into pressing relation With the end` ot the mandrel at proper intervals, and since the presser does not turn with the mandrel a twist is given to the tolded over paper at the same time that pressure is applied to flatten and compact the same. Practice has demonstrated that with a non-rotatable presser the edges of the paper, due to the twisting ac tion and the tendency of the paper edge to catch, become torn, more or less, which causes the cream `tiller to leak through.

The principal object therefore, of my inventiom is to overcome this objectionable feature and to that end l provide a presser member composed ot' a non-rotatable central portion and a rotatable annular portiom thus providing a structure in which that part ot the presser which contacts the edge of the container rotates with the container and mandrel While that part which is required to pjive the twist-pressure to the folded over paper remains stationary. Y

Further, it is an obfect oit the invention to provide a means to improve the structure of the container by ettectino; a better sealing ot3 the bottom `:vithout the necessity ot additional operations beyond those noW em ployed.

Genetically' the invention resides in the novel construction, combination and arrangement of parts, which will be hereinafter described, and then pointed out in the appended claims, ret'erence beinef had to the accom panyinp,q drawing, in which:

Figure 1 is a side elevation of a portion oi a paper cylinder machine showing the rotatable mandrel mounted in its bearing, a paper cup being shown (parts of the cup being; broken away) and with the presser about to be brought into action.

Figure 2 is a vertical longitudinal section (parts being shown in elevation) showing;

theprefser in position, the paper cup being indicated in dotted lines.

Figure 3 is detail vertical longitudinal section and part elevation ot a slight modification oi' the invention,

Figure t is a perspective view ot the presser unit of Figure 8 per se.

in the drawing in `which parts performnggj the same iinnction rmd having the same elation to other parts bear the same refernce numbers, the mandrel lis shown journalled in spitable bearing` 2 and provided iith a Lgear portion 3 that may mech with me drivingl gears (not shown) by means of which the rotating` motion is given to the mandrel on its central axis. The mandrel 1 las its outer' end cupped as at 4 to receive the cup end 6 ot the ejector, the rod 5 of which passes through the mandrel and is operated, at suitable interi/'alg by mechanism (not shown) toeject or strip container from the mandrel.

An `arm 7, pivoted at 8, is turned on `its pivot by suitable mechanism (not shown) operating` at timed intervals to bring the presser head into and remove it Yfrom relation with the mandrel. The presser head ot my invention comprises a stud having a stationary head constituting the stationary presser plate7 a shank 10 with reduced threadedf end forming` a shoulder 11 to abutthe arms 7 through which the threadedend passes and is secured by a nut.

lotatably mounted on the head 9 and shank 10 4(seey Figure 2) is the rotatable pressermember 13. This `member 13 is recessed at 1-t to receive the head 9 so that the pressing tace ot the head 9 and the correspmiding` tace ot the member 13 Willibe flush. rThe rotatable head member 13 is held in place by a spring` 19 as indicated in Figures `1 and 2 ot the drawinv.

instead of applying` the spring 19 over the hub 15 into direct Contact With the presser member 13, a dish 18 having` a ball race registering; With a ball race 16 in the rotatable head 13 is provided, balls 1T being located in the races to reduce friction (see Figure The operationn eo tar as the timing of the movements ot' the mandrel, the ejector and the presser are concerned1 does not dier .trom previous practice. However, since the member 13 can turn with the mandrel through its trictional engagement with the paper, all danger ot tearing; the paper at the folded over edge is eliminated; the direct pressure o'f plate 9 and the pressure applied viar spring 19 to the rotatable head member 13 ,serve tightly to compact the t'olded over paper and render the same proof against leakage when the content is placed in the cylindrical container.

From the foregoing description, taken in connection with the accompanying drawing, it is thought the construction, operation and advantages of my invention will be clear to those skilled in the art to which it relates.

What I claim is z" l. In paper cylinder forming machines in which a rotatable mandrel cooperates with a presser to form the cylinder with a closed end; a .presser comprising a head having a non-rotatable tace portion and a rotatable face portion.

2. In paper cylinder forming machines in which a rotatable mandrel cooperates with a presser to form the cylinder with a closed end; a` presser comprising a stud having a pressing face, means holding said stud against rotation and adapted for carrying said presser to and from cooperative relation with the mandrel, and a rotatable member carried by the stud and having a pressing face cooperating with the pressing face of said stud, and meansto hold said rotatable member in place on said stud.

3. In paper cylinder forming machines in which a rotatable mandrel cooperates with a presser to form the cylinder with a closed end; a presser comprising a stud having a pressing face, means holding said stud against rotation `and adapted for carrying said presser to and from cooperative relation with the mandrel, and a rotatable member carried by the stud and having a pressing face cooperating with the pressing face of said stud, and means to hold said rotatable member in place on said stud, said means comprising ahead on the stud, a recess in said rotatable member for said head, and a spring for holding said rotatable member against said head.v

4. In a machine for forming paper cylinders with closed ends, the combination with a rotatable mandrel, oit a combined rotatable-section and non-rotatable-section presser' for the purposes described.

5. In a machine for forming paper cylinders, a rotatable mandrel having a cupped end, a presser adapted to be brought into and removed from cooperative relation with said cupped end and itself including means to pressthe paper of the folded over edge into the cup in a dir ction substantially parallel with the axis ot the mandrel, and also including means to impart a twisting pressure to the central part of the paper within the cup whereby the major portion of the twist of the paper will be given at the center oi the cup. 6. In a machine for forming paper cylinders, a rotatable mandrel over one end of which the paper is adapted to be folded, a presser member for pressing the folded over paper tightly together to form the bottom of the cup, said presser member having an annular rotatable portion adapted to rotate with the' cylinder and a central nonrotatable portion for the purposes speciiied.

7. As a new article, a presser member for paper cylinder forming machines which comprises a stud having a head and a shank., a` ringdike head member mounted on said stud and countersnnk to receive said head ot the stud, whereby the face of the stud and the corresponding face ot' said ring-like head member will register7 and a coil spring on the stud tor pressing said ring-lilre head member toward the head of the stud and continuously tending to maintain the registering faces of stud and ringlike head meinber in the same plane.

8. As al new article, a presser memberior paper cylinder forming machines which co1nprises a stud having a head and a shank,` a ring-like head member mounted on said `stud and countersunlr to receive said head ot thestud, whereby the face ot the stud and the corresponding tace ot said ring-like head member will register, and a coil spring ou the stud for pressing said ring-likc head member toward the head oi the stud and continuously tending to maintain the reg istering faces of stud `and ringlihci head member in t-he same plane, and anti-'i'riction bearing members.interposed between said spring and said rotatable v ingeliltehead member.

GREGORY SMITH WOODFORD. 

